. >>> nasa says there is new evidence to suggest that 7 billion years ago mars may have been home to tiny microorganisms. the sample contains sulfur, nitrogen, hydrogen, oxygen, phosphorous and carbon the key ingredients for life. >> it went down just a few centimeters and hitting a gray planet instead of a red plant to me was very surprising. >> reporter: they found an environment which could have been suitable for life. so far they have found no signs of actual microbes on mars. >>> and no winter around here. temperatures were in the 70s today. they're going to be warmer tomorrow. delays along the eastern seaboard. out west we have dry conditions that continue as the jet stream rams over the top of us. that's how it's going to stay. the jet stream keeps going to the north of us right through the bay area weekend into a good portion of next week. we have plenty of coastal fog. that fog is making for dense visibility right along the great highway. fog is going to be there when you wake up tomorrow morning. so be prepared for it we had it this morning. we had been in a warming trend.